diff --git a/sass/01-base.scss b/sass/01-base.scss
index 13db340..fa54eec 100644
--- a/sass/01-base.scss
+++ b/sass/01-base.scss
@@ -10,7 +10,9 @@
 
 /* switching box model for all elements */
 * {
-	box-sizing: border-box;
+	-webkit-box-sizing: border-box;    /* Safari/Chrome, other WebKit */
+	   -moz-box-sizing: border-box;    /* Firefox, other Gecko */
+	        box-sizing: border-box;    /* Opera/IE 8+ */
 }
 
 /* soft reset */